[INFO] cloning repository https://github.com/LnL7/letty
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/LnL7/letty" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLnL7%2Fletty", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLnL7%2Fletty'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 372be41dda29b059fef0e82720f887e92581c5c5
[INFO] checking LnL7/letty against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FLnL7%2Fletty" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/LnL7/letty on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/LnL7/letty
[INFO] finished tweaking git repo https://github.com/LnL7/letty
[INFO] tweaked toml for git repo https://github.com/LnL7/letty written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/LnL7/letty already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 298bba16188774d6cf7aede919676475cd6e72b79c64c69b4b68573e2fdf07fd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "298bba16188774d6cf7aede919676475cd6e72b79c64c69b4b68573e2fdf07fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "298bba16188774d6cf7aede919676475cd6e72b79c64c69b4b68573e2fdf07fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "298bba16188774d6cf7aede919676475cd6e72b79c64c69b4b68573e2fdf07fd", kill_on_drop: false }`
[INFO] [stdout] 298bba16188774d6cf7aede919676475cd6e72b79c64c69b4b68573e2fdf07fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:e18d859f9e32a1da89bc7b2d7d51e13b57342044d1295d9fc0dd0068c58eb3d1" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] eecc3d7268b6a5bb56e56cd3d1978ce2bb3af673a16db550e638aca03e4e99fd
[INFO] running `Command { std: "docker" "start" "-a" "eecc3d7268b6a5bb56e56cd3d1978ce2bb3af673a16db550e638aca03e4e99fd", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]    Compiling core-foundation-sys v0.6.2
[INFO] [stderr]    Compiling io-kit-sys v0.1.0
[INFO] [stderr]     Checking mach v0.2.3
[INFO] [stderr]     Checking core-foundation v0.6.4
[INFO] [stderr]     Checking letty v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.58s
[INFO] running `Command { std: "docker" "inspect" "eecc3d7268b6a5bb56e56cd3d1978ce2bb3af673a16db550e638aca03e4e99fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eecc3d7268b6a5bb56e56cd3d1978ce2bb3af673a16db550e638aca03e4e99fd", kill_on_drop: false }`
[INFO] [stdout] eecc3d7268b6a5bb56e56cd3d1978ce2bb3af673a16db550e638aca03e4e99fd